Jump to content
  • [6.12.6] Wrong free space capacity reported for SSD pool/cache drives

    • Annoyance

    I have 3, 3TB SSDs in a pool for my cache. The Size correctly reports 3TB, but the "Used" and "Unused" incorrectly total to around 2.15TB.




    Notably, when doing a large amounts of downloads, the other day the Used space got up to 2.8TB+ of Used space. This seems to confirm the reported free space is being incorrectly calculated or displayed. The True capacity of 3TB seems correct, but the Free space utility never lists it. It should be showing 2.7-2.8TB of free space right now but only lists 2.04. Diagnostics ZIP is attached. My Unraid has done a couple upgrades and this issue has been around since I installed these 3 drives to the pool. 




    User Feedback

    Recommended Comments

    This is an old btrfs issue when an odd number of devices are used for a raid1 pool, free space will get close to correct as you fill up the pool, used space will always be correct.

    Link to comment

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.
    Note: Your post will require moderator approval before it will be visible.

    Add a comment...

    ×   Pasted as rich text.   Restore formatting

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

  • Status Definitions


    Open = Under consideration.


    Solved = The issue has been resolved.


    Solved version = The issue has been resolved in the indicated release version.


    Closed = Feedback or opinion better posted on our forum for discussion. Also for reports we cannot reproduce or need more information. In this case just add a comment and we will review it again.


    Retest = Please retest in latest release.

    Priority Definitions


    Minor = Something not working correctly.


    Urgent = Server crash, data loss, or other showstopper.


    Annoyance = Doesn't affect functionality but should be fixed.


    Other = Announcement or other non-issue.

  • Create New...